From littoral.homo@gmail.com@21:1/5 to All on Thu Mar 9 03:03:17 2023
Evolution of Man's erect posture
Dudley J Morton 1926
J Morphol doi 029/10.1002/jmor.1050430108
...
man's erectly supported body could on have originated from a vertically suspended posture (vertical).
The fact that the prehuman stem passed through an earlier arboreal and brachiating period is attested to by the grasping character of the hands, the ratio of arm-body length, the etreme mobility of the shoulder-joints, as well as the extension of his
legs on the body.
The semierect posture of the great apes is not an advance toward human bipedalism, but a modern reversion toward quadrupedalism. ...